我院楊學弦副教授在國際著名期刊Applied Physics Letters發表論文

我院楊學弦副教授以“Effects of doping concentration on bond length and bond energy studied by Raman shift”為題在應用物理類國際權威期刊Applied Physics Letters上發表最新研究成果。基于其本人前期建立的計量聲子譜學分析方法并結合拉曼頻移組份效應實驗，該研究工作構建了合金拉曼譜組份效應的定量解析新方法，為進一步的研究合金材料微觀晶體結構和宏觀物理性能提供了新的理論計算和實驗分析新方法。

該研究工作以77779193永利為第一單位，楊學弦副教授為論文第一作者發表。研究工作得到了國家自然科學基金(No. 11602094)、新加坡教育部[No. RG70/20 (2020-T1-001-023)]、湖南省自然科學基金(No. 2022JJ30470)和國家公派留學基金(No. 202008430239)的資助。

Applied Physics Letters是美國物理學會（AIP）主辦的老牌經典期刊，出版應用物理領域的重要研究成果，在國際上有很高的認可度和一定的影響力。

論文鍊接：https://doi.org/10.1063/5.0160714.

圖1. (a) and (c) Relationships between Raman frequencies of the A1g and E2g modes and equivalent coordination number for Mo_(1-x)W_xSe₂ and Mo_(1-x)W_xS₂ monolayers. (b) and (d) Relationship between equivalent coordination number and doping concentration generated from (a) and (c).

圖2.(a) and (c) Relationships between Raman frequencies and equivalent coordination number for WS_2xSe_2(1-x) and MoS_2xSe_2(1-x) monolayers. Figure 2 (b) and (d) Relationship between equivalent coordination number and doping concentration according to (a), (c).

圖3. Chalcogen atom S doping-induced bond length change for WS_2xSe_2(1-x) and MoS_2xSe_2(1-x); transition metal W doping-induced bond length change for Mo_(1-x)W_xSe₂ and Mo_(1-x)W_xS₂, showing the agreement between the calculated data from this work and the Vegard's scheme.

（審核責任人 伍建華）